Blackboard



Patented Nov. 2S, i922.

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JOSEPH F. PHILLIPPI, OF HAMBURG, NEW YORK.

BLACKBOARD.

Application led April 6, 1922. SerialNo. 550,066.

This invention relates to educational ap-L pliances and more particularly to blackboards.

The object of the invention is to provide a rotatable blackboard in connection with a screen or curtain having an opening for use to expose indicia carried by the board, the turning of the `board operating to bring into view different figures or characters dependent upon the subject being demonstrated. j

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the inventionherein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 represents a side elevation of the board constituting this invention, and

Fig. 2 is a front elevation thereof.

In the embodiment illustrated a supporting structure Vis shown in the form of a standard or post 1 composed of telescopically engaged sections 2 and 3 yheld in adjusted position by a set screw 4 which also extends through a collar 5 carried by section 1 from which a laterally extendin arm 6 projects with a chalk tray 7 mounte at the outer end of said arm.

The standard 1 is mounted in a base 8 which may be of any desired configuration being here shown cylindrical and provided with radially extending feet 9 any desired number of which may be employed, three being here shown. i

The post section 3 is provided at its upper end with a T-shaped coupling 10 in which is mounted a substantially U-shaped bracket 11 having bearings 12 and 13 at the free ends thereof in which is supported a spindle 14. rI`his spindle 14 extends through V these bearings and has fixed to one end a demonstrating member here shown in the form of a circular blackboard `15. The other` end of the spindle or shaft 14 has a handle 16 for rotating the spindle and the board 15 carried thereby. A rod 17 rises from the bearing 13 and has a cross bar or head 18 secured to its upper end and extending laterally beyond opposite sides thereof. Shade brackets 19 are carried by the' cross bar -18 and are designed to support the spring roller 20 having a curtain 21 secured thereto; This curtain 21 is mounted in front of the boardk 15 and has a slot-like opening 22 therein preferably midway its width positioned so as to disclose indicia carried by the outer face of the board 15 as is shown clearly in Fig; 2.

he rotary board 15 may carry on its outer face any suitable indicia according to the subject to be demonstrated, digits 23 being here shown, which are designed to be used in 4teaching children addition, subtraction andthe like. It is of course understood that other subjects may be demonstrated such as geometry, geography and the like, the characters being displayed through the opening 22 in the curtain 21 and said' opening may be lengthened or shortened as desired by raising or lowering the curtain in front of the board in the same manner that a springl shade roller is operated.

By forming the standard 1 of telescopically engaged sections, the board 15 may be raised or lowered to suit the convenience of the teacher, and is held adjusted by the set screw 4 in an obvious manner. .i

I claim 1. In a device of the class described a supporting structure a horizontally disposed shaft mounted to rotate therein, an upright v blackboard ,carried by one end of said shaft and rotatable therewith, and a vertically ad* j usted screen arranged in front of said board and having a sight opening therein.

2. In a device of the class described a supporting structure comprising a standard having Asupporting feet and composed ofv telescopically engaged sections, a U-shaped bracket carried by one of said sections, a shaft rotatably mounted inthe arms of said bracket, a. blackboard ixed to said shaft to rotate therewith the standard rising from said structure at the rear of Said board, a spring roller Screen mounted on said standard in advance of said board and having a, sight opening therein adapted to display the front face of the board.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

JOSEPH F. PHILLIPPI. Witnesses:

GERTRUDE M. BACON, HARRY W. ROCKWELL. 

